From the Article on Bush Hatin'
Like any emotion, hatred (in others) must be inferred from (their) behavior (including linguistic behavior). There are four signs of hatred:
* Obsession. The hater returns again and again to the hated. Nothing looms larger in the hater's mind. The hated becomes a brooding omnipresence, a focus of suspicion, fear, and loathing.
* Inability to see ‑- much less to acknowledge ‑- good in the hated. The hated becomes the very personification of evil, incapable of being, intending, or doing good. Nobody is perfectly bad, of course, but this is how the hated appears.
* Cynicism. Nothing the hated says is taken at face value, however plausible it may be on its face and however sincerely it is expressed. Indeed, the hated's claim of good motivation is often taken as further evidence of his or her viciousness, duplicity, or perversity.
* Malevolence. The hater is not merely indifferent to the welfare of the hated, as might be the case with a stranger, but wishes things to go poorly for him or her. The hater delights in the hated's misery or misfortune. The Germans have a special word for this: "schadenfreude."
http://www.techcentralstation.com/102103A.html